Function exists 

pub fn exists(
    ctx: &Ctx,
    key: &str,
) -> impl Future<Output = Result<bool>> + Send + use<>

Returns whether an object exists at key (Active Storage’s exist?); a head without the details.

Free plan: one R2 class B operation (10M free per month).

Errors

Error::Internal (500) when the STORAGE binding is missing or R2 fails.

Examples

use axum::extract::{Path, State};
use ocre::{Ctx, Result, storage};

async fn check(State(ctx): State<Ctx>, Path(key): Path<String>) -> Result<String> {
    Ok(storage::exists(&ctx, &key).await?.to_string())
}